Thursday, November 17, 2011

IPv6 Configuration

Sample IPv6 Network

The 3 ways for assigning an IPv6 address to a node are manual configuration (static), stateless autoconfiguration (dynamic), and stateful DHCPv6 (dynamic).

The ipv6 unicast-routing global configuration command globally enables the forwarding of IPv6 packets (IPv6 routing) for interfaces configured with an IPv6 address. This command also enables Neighbor Discovery Protocol for LAN interface types, eg: Ethernet. RT1 and RT2 must be configured with this command in order to forward IPv6 packets between physical interfaces.

The ipv6 enable interface subcommand configures an IPv6 link-local address and enables IPv6 processing for an interface and on the interface. The link-local address can be used only for communication with nodes reside on the same link or network.
Note: This command does not enable the Neighbor Discovery Protocol.

The ipv6 address {ipv6-addr/prefix-length [eui-64] | {ipv6-addrlink-local} interface subcommand configures a global IPv6 address on an interface and enables IPv6 processing on the interface. The eui-64 keyword configures an IPv6 address with the last 64 bits of the IPv6 address in EUI-64 format. The link-local keyword configures a specific link-local IPv6 address on an interface instead of using the automatically generated Interface ID in EUI-64 format.
Note: This command does not enable the Neighbor Discovery Protocol.

The link-local address of a neighbor can be specified as the next-hop address for a static route. If using a link-local address as the next-hop address, then both the outgoing interface and link-local address and must be specified in the static route configuration.

Note: The ipv6 rip {rip-proc-name} enable interface subcommand will start a RIPng process with the defined tag. The ipv6 router rip {rip-proc-name} global configuration which enters the router configuration mode is optional and is not required to enable a RIPng process. The tag name is local significant and does not have to match between RIPng routers.